The genus
Ceratonereis is divided into 3 new subgenera:
Ceratonereis,
Simplisetia and
Composetia. Special reference is given to the species of the subgenus
Ceratonereis; 3 new species and subspecies of
Ceratonereis will be described:
C. (C.) brockorum from Guam and
C. (C.) longiceratophora,
C. (C.) perkinsi and
C. (C.) singularis australis from Australia. The zoogeographical distribution of the Australian
Ceratonereis species is discussed.